Noronhia clarinerva

Hong-Wa, Cynthia, 2016, A taxonomic revision of the genus Noronhia Stadtm. ex Thouars (Oleaceae) in Madagascar and the Comoro Islands, Boissiera 70, pp. 1-292 : 69-71

publication ID

https://doi.org/ 10.5281/zenodo.7599432

DOI

https://doi.org/10.5281/zenodo.7596129

persistent identifier

https://treatment.plazi.org/id/824F8D54-FFE3-3A52-FE27-FEE0FC6CFBBA

treatment provided by

Carolina

scientific name

Noronhia clarinerva
status

 

13. Noronhia clarinerva View in CoL View at ENA Hong-Wa, spec. nova ( Fig. 7B View Fig , 10).

Typus: MADAGASCAR. Prov. Antsiranana: DIANA , Diégo II , Sakaramy, Montagne d’Ambre AP, 12°26’25”S 49°13’49”E, 319 m, 2. VI GoogleMaps .2010, Hong-Wa 708 (holo-: MO-6400693!; iso-: P!, TAN!).

Diagnosis

Noronhia clarinerva Hong-Wa can be distinguished from its congeners by its oblong to rhombic, coriaceous leaf blades, its light-colored venation and its fasciculate pinkish flowers.

Description

Shrubs to 5 m tall, trunk to 3 cm diameter; young twigs cylindrical, 0.8-1.4 mm diameter, glabrous; bark whitish, smooth. Leaves opposite, persistent; bud scales persistent only on very young twigs; blades medium green above, lighter below, oblong to rhombic, 4.5-7.5 3 1-2.5 cm, coriaceous, glabrous, domatia absent, base acute, margin flat to slightly undulate, apex acuminate, the acumen 2-16 mm long, midrib sunken above, raised below, secondary veins conspicuous mostly below, 7-12 per side, 5-10 mm apart, looping 1-2 mm from the margin; petiole light gray to whitish, 3.5-7 3 1-2.5 mm, entirely woody, glabrous. Flowers fasciculate; pedicel 3-4 mm long, glabrous; calyx moderately pubescent outside, glabrous inside, lobes deltate, 2 3 1.5 mm; corolla pinkish, urceolate, 4.5 mm long, glabrous on both sides, the tube 3.5 mm long, lobes widely ovate, apex obtuse to acute; corona present, 1.7 mm long, undivided; stamens 2 mm long, anthers oblong, 1.8 mm long; pistil 2.5 mm long, stigma slightly bilobed. Fruiting pedicel 5-11 3 0.8-1.6 mm; young fruits green, brown when mature, ovoid, 10-13.5 3 6.5-9 mm, surface smooth, apex apiculate; dry pericarp 0.4-0.7 mm thick; endocarp woody.

Etymology

Noronhia clarinerva has distinctively light-colored veins, which are almost white on dry specimens, thus the name of the species.

Distribution, ecology and phenology

Noronhia clarinerva occurs in low- to mid-elevation dry forests in the north, from Montagne d’Ambre to Daraina ( Fig. 9 View Fig ). It produces flowers and fruits from December to June.

Conservation status

Noronhia clarinerva is currently known from nine collections representing eight localities, which are encompassed within an EOO of 1,066 km 2, an AOO of 28 km 2, and four subpopulations representing four locations. All but one location occur entirely within protected areas (Loky-Manambato and Montagne d’Ambre) whereas the fourth sits just at the border of Montagne d’Ambre PN, with some individuals actually found outside of it. With the gradual encroachment for crop cultivation, wood harvesting, illegal logging, and cattle grazing already taking place there, this location is susceptible to decline in habitat quality and loss of mature individuals in the near future. Therefore, N. clarinerva is assigned a preliminary status of “Endangered” [EN B1ab(iii,v)+2ab(iii,v)].

70

Notes

Noronhia clarinerva closely resembles N. crassinodis , but differs by lacking bud scales at maturity and by having lighter-colored and more conspicuous venation, oblong to rhombic (vs. obovate), acuminate (vs. mucronulate) leaf blades, and pinkish (vs. red purplish) flowers.

Paratypi

MADAGASCAR. Prov. Antsiranana: Daraina, Ankijabe , forêt de Bekaraoka , 13°10’02”S 49°42’38”E, 150 m, 15.III.2003, Gautier et al. 4386 ( Daraina , G, K, MO, P, TEF); Montagne d’Ambre PN GoogleMaps , 12°29’22”S 49°10’16”E, 670 m, 8.XII.2006, Gautier & Chatelain 5084 ( G, K, MO, P, TAN, TEF); ibid. loc GoogleMaps ., 12°25’40”S 49°13’56”E, 300 m, 29. V GoogleMaps .2010, Hong-Wa 694 ( MO, P, TAN); ibid. loc GoogleMaps ., 12°26’40”S 49°13’56”E, 300 m, 29. V GoogleMaps .2010, Hong-Wa 696 ( MO, TAN); ibid. loc GoogleMaps ., 12°26’28”S 49°13’58”E, 331 m, 1. VI GoogleMaps .2010, Hong-Wa 704 ( MO, P, TAN); Analamazava, part of Binara Range, SW of Daraina , 13°15’S 49°38’E, 200-1180 m, 20.IV.1990, Meyers 98 ( G, MO, P, TAN); Daraina , forêt de Binara GoogleMaps , 13°15’21”S 49°37’00”E, 340 m, 18.XII.2003, Nusbaumer 821 ( Daraina , G, K, MO, TAN); Montagne d’Ambre GoogleMaps , 12°29’16”S 49°10’21”E, 650 m, 4. VI GoogleMaps .2008, Trigui et al. 535 ( G, MO, TEF) .

VI

Mykotektet, National Veterinary Institute

G

Conservatoire et Jardin botaniques de la Ville de Genève

K

Royal Botanic Gardens

MO

Missouri Botanical Garden

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

TEF

Centre National de la Recherche Appliquée au Developement Rural

TAN

Parc de Tsimbazaza

V

Royal British Columbia Museum - Herbarium

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Lamiales

Family

Oleaceae

Genus

Noronhia

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